This article links to the main piece on HealthySoil which explains the broader shift in biochar markets and carbon credits. Here, we focus on what that shift means for soil systems and the Biochar–Humus Complex (BHC). The key issue for soils Carbon markets are pushing production toward high-carbon biochar. However: Soil systems do not optimise…

A shift toward durability and soil function The EU’s carbon removal certification framework emphasises permanence — the ability of stored carbon to remain stable for centuries. This focus has important implications for how biochar is deployed in soils. While pure biochar can deliver long-term carbon storage, soil performance often depends on how biochar interacts with…

Indicative economics for PAS100 composting sites exploring biochar humus composite (BHC) pathways Lead This article discusses the indicative economics that may lead some PAS100 composting sites to explore pathways beyond supplying PAS100 compost alone. In particular, it examines a configuration in which the woody fraction of green waste (typically material above ~4–25 mm) is used to…

Why biochar replaces wood chip as a bulking agent at compost scale Short answer At compost scale, bulking agents are structural tools, not disposable inputs. Biochar can replace wood chip in this role while maintaining airflow and process control. This substitution improves both material performance and value capture. For the full article, please visit our…

Why PAS100 compost composition limits long-term soil persistence Short answer Standard PAS100 compost performs well for sanitation and organic matter recycling, but its material composition limits how long its soil benefits persist. This is not a failure of composting, but a consequence of what PAS100 is designed to optimise. Understanding this boundary helps avoid unrealistic…

Top dressing soil with BHC Short answer Top dressing with BHC is intended to integrate material into soil over time, not to remain permanently on the surface. Some redistribution is expected and desirable. Apparent “washing” does not indicate loss of function. The main practical risk is export before incorporation under poorly timed water inputs. What…

Evidence ladders for assessing stable soil carbon Short answer No single test can certify stable soil carbon. Credible assessment requires multiple methods, matched to the strength of the claim being made. An evidence ladder prevents over-interpretation and protects credibility. What this page helps you understand or avoid This page helps readers understand why responsible claims…

Certified Biochar Humus Composite (BHC)™: what it means Short answer When you see the term Certified BHC™, it signals discipline, not hype.It indicates that a biochar humus composite (BHC) has been developed within clear quality guardrails, rather than mixing components opportunistically.The aim is predictable soil function over time, not short-term gains.This page explains what that…

How Biochar Humus Composite (BHC)™ certification supports commercial use Short answer BHC certification is designed to help Biochar Humus Composite materials be used, trusted, and adopted in real markets. Its purpose is to provide clarity, consistency, and confidence for producers, partners, and professional users, without creating unnecessary bureaucracy or slowing innovation. Rather than acting as…